diff --git a/elements/neuron/axon.md b/elements/neuron/axon.md
index b3f9bee..15aa5b4 100644
--- a/elements/neuron/axon.md
+++ b/elements/neuron/axon.md
@@ -5,13 +5,9 @@ Qui comprendiamo:
 - AXON: Axon
 
 ## AXON: Container
-
 The axon does not contain specific behavior.
-
 - We might add balancing of ATP within PRE later. Here we comprehend it as a “cable” transporting the AP from SOMA to Presynapse. It expands PRESYNAPSE which:
-
 - l'equivalente del tuning della PRESYNAPSE, come espansione dell'AXON, e' fatta da excitation/inhibition in winnertakeall. Per equivalente si intende che e' uno spostare PRESYNAPSE da actual, come se fosse un tuning.
-
 - the associations between PRESYNAPSE, POSTSYNAPSE e SYNAPSE is performed by the "bind" in excitation/inhibition in winnertakeall. Because we have to make sure that the correct binding is performed when intricating actuals.
 
 ```Gen
@@ -21,6 +17,6 @@ AXON
 
   expansion:
 
-    _presynapse: TUB [ comp: PRESYNAPSE, full: 50x, active: 0x, empty: 10x ]
+    _presynapse: TUB_EXP [ comp: PRESYNAPSE, full: 50x, active: 0x, empty: 10x ]
     # managed_by: EXCITATION or INHIBITION from winnertakeall
 ```
diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index abe596c..cba81bb 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -18,7 +18,7 @@ PRESYNAPSE
 
   expansion:
 
-    _Vgcc_pre: TUB [ comp: VGCC_PRE, full: 10x, active: 5x, empty: 2x ]
+    _Vgcc_pre: TUB_EXP [ comp: VGCC_PRE, full: 10x, active: 5x, empty: 2x ]
     # il tub serve al tuning
 
   intrication:
@@ -31,9 +31,9 @@ PRESYNAPSE
     *AP: CONTEXT [&SOMA.*AP]
 
     # Tub
-    _NT: TUB [ ref: &ASTROSYNAPSE._NT] 
-    _ATP: TUB [ ref: &ASTROCYTE._ATP] 
-    _eCB: TUB [ ref: &POSTSYNAPSE._eCB]
+    _NT: TUB_FLOOR [ ref: &ASTROSYNAPSE._NT] 
+    _ATP: TUB_FLOOR [ ref: &ASTROCYTE._ATP] 
+    _eCB: TUB_FLOOR [ ref: &POSTSYNAPSE._eCB]
 
   instantiation:
 
@@ -41,12 +41,12 @@ PRESYNAPSE
     *TunePossible: CONTEXT []
 
     # Tub
-    _Ca2+: TUB [ full: 60x, active: 30x, empty: 0x ]
-    _Rrp: TUB [ full: 30x, active: 15x, empty: 0x ]
-    _Rp: TUB [ full: 30x, active: 15x, empty: 0x ]
-    _CaTraces: TUB [ full: 50x, active: 0x, empty: 0x ]
+    _Ca2+: TUB_FLOOR [ full: 60x, active: 30x, empty: 0x ]
+    _Rrp: TUB_FLOOR [ full: 30x, active: 15x, empty: 0x ]
+    _Rp: TUB_FLOOR [ full: 30x, active: 15x, empty: 0x ]
+    _CaTraces: TUB_FLOOR [ full: 50x, active: 0x, empty: 0x ]
 
-    _Ca2+FullDev: TUB [ full: 100x, active: _Ca2+.full, empty: 40x ]
+    _Ca2+FullDev: TUB_FLOOR [ full: 100x, active: _Ca2+.full, empty: 40x ]
     # serve al dev
 
     # Behaviour
@@ -535,4 +535,3 @@ Ca2+ClearanceHigh
       action: [Ca2+ decrease]
       trace: None
 ```
-